Data Sheet No. PD94134 IRU1206 / IRU1207 / IRU1208 / IRU1209 1A VERY LOW DROPOUT POSITIVE FIXED AND ADJUSTABLE REGULATORS DESCRIPTION FEATURES Low Dropout Voltage (500mV at 1A) 1% Voltage Reference Accuracy Low Ground Current 1mA Maximum Quiescent Current in Shutdown (IRU1207, IRU1208) Fast Transient Response Current Limit and Thermal Shutdown Error Flag Signal for Output out of Regulation (IRU1207, IRU1208) APPLICATIONS 2.5V Supply from 3.3V Input for the new generation of Logic ICs Computer Mother Board, Add-On Cards High Efficiency Post Regulator in Switch Mode Power Supply (SMPS) The IRU1206 family of devices are ultra low dropout 1A regulators using PNP transistor as the pass element. These products are ideal when a single input supply is only available and the dropout voltage is less than 1V, exceeding the minimum dropout characteristics of NPN/ PNP hybrid regulators. One common application of these regulators is where input is 3.3V and a 2.5V output is needed. Besides the low dropout of less than 0.5V, other features of the family of the parts are: micro-power shutdown capability and output UVLO detection where Flag pin is switched low when output is below 5% of its nominal point. TYPICAL APPLICATION VOUT 3 VOUT IRU1206XX Gnd 2 VIN C2 1 VIN C1 Figure 1 - Typical application of the 1206-XX in a 3-Pin SOT-223 package. PACKAGE ORDER INFORMATION TJ (°C) 0 To 125 0 To 125 0 To 125 0 To 125 0 To 125 0 To 125 0 To 125 0 To 125 Rev. 2.3 08/02/02 2-PIN TO-252 3-PIN (D-PAK) SOT-223 (Y) IRU1206-18CD IRU1206-18CY IRU1206-25CD IRU1206-25CY IRU1206-33CD IRU1206-33CY NA NA NA NA NA NA NA NA NA NA 8-PIN PLASTIC SOIC (S) NA NA NA IRU1207-18CS IRU1207-25CS IRU1207-33CS IRU1208CS IRU1209CS www.irf.com VOLTAGE PIN FUNCTIONS 1.8V 2.5V 3.3V 1.8V 2.5V 3.3V Adj Adj VIN, VOUT, Gnd VIN, VOUT, Gnd VIN, VOUT, Gnd VIN, VOUT, Gnd, Enable, Flag VIN, VOUT, Gnd, Enable, Flag VIN, VOUT, Gnd, Enable, Flag VIN, VOUT, Gnd, Flag, Adj VIN, VOUT, Gnd, Enable, Adj 1 IRU1206 / IRU1207 / IRU1208 / IRU1209 ABSOLUTE MAXIMUM RATINGS Input Voltage (V IN) .................................................... 12V Enable Input Voltage ................................................ 12V Storage Temperature Range ...................................... -65°C To 150°C Operating Junction Temperature Range ..................... 0°C To 135°C PACKAGE INFORMATION 2-PIN PLASTIC TO-252 (D-Pak) IRU1206 3-PIN PLASTIC SOT-223 (Y) IRU1206 FRONT VIEW TOP VIEW 3 VOUT Tab is Gnd 1 Tab is Gnd θJA=70°C/W for 0.5" Sq pad V IN 8-PIN PLASTIC SOIC (S) IRU1208 IRU1207 VOUT 2 Gnd 1 VIN θJA=90°C/W for 0.4" Sq pad IRU1209 TOP VIEW TOP VIEW 3 TOP VIEW Enable 1 8 Gnd Flag 1 8 Gnd Enable 1 8 Gnd VIN 2 7 Gnd VIN 2 7 Gnd VIN 2 7 Gnd VOUT 3 6 Gnd VOUT 3 6 Gnd VOUT 3 6 Gnd Flag 4 5 Gnd Adj 4 5 Gnd Adj 4 5 Gnd θJA=55°C/W for 1" Sq pad θJA=55°C/W for 1" Sq pad θJA=55°C/W for 1" Sq pad ELECTRICAL SPECIFICATIONS Unless otherwise specified, these specifications apply over CIN=COUT=10mF, V IN=Vo+1V, VOUT=VFB (For adjustable version only), and TA=25°C. Typical values refer to TA=25°C. Low duty cycle pulse testing is used which keeps junction and case temperatures equal to the ambient temperature. PARAMETER Initial Voltage Accuracy (see Table 1 for nominal values) Line Regulation Load Regulation (Note 1) SYM Vo Output Voltage Temp Coef. Dropout Voltage (Note 2) DVO(T) DVI(O) Io=100mA (Note 4) Io=500mA (Note 4) Io=1000mA (Note 4) IQ VIN=Vo + 1 for all conditions: Io=100mA (Note 4) Io=500mA (Note 4) Io=1000mA (Note 4) ICL Vo=5% Below Regulation Point VIN(min) Ground Current (Note 3) Current Limit Minimum Input Voltage IRU1208, IRU1209 Adjust Pin Current Minimum Load Current 2 DVI DVL IADJ TEST CONDITION Io=10mA, TA=258C (Note 4) Vo + 1V<VIN<12 10mA<Io<1A 1mA<Io<150mA MIN -1 -1.3 0.5 0.5 20 100 300 500 1.1 1.4 2.1 2.3 0.1 1 www.irf.com MAX 1 1.3 1 0.7 0.5 100 200 400 650 3 15 50 VIN=2.5V, Vo=VADJ (Note 4) IO(min) TYP UNITS % % % ppm/8C mV mA A V mA mA Rev. 2.3 08/02/02 IRU1206 / IRU1207 / IRU1208 / IRU1209 PARAMETER IRU1207, IRU1209 Ground Current - SD Activated Enable Pin Input LO Voltage Enable Pin Input HI Voltage Enable Pin Input LO Current Enable Pin Input HI Current IRU1207, IRU1208 Flag Output Threshold Voltage Flag Output Hysteresis Voltage Flag Output Saturation Voltage SYM IQ(SD) VEN(L) VEN(L) TEST CONDITION MIN Enable=Open Regulator OFF (Note 4) Regulator ON (Note 4) VEN(L) =0V to 0.8V (Note 4) VEN(L) =2V to Vin (Note 4) Note 2: Dropout voltage is defined as the minimum differential voltage between VIN and VOUT required to maintain regulation at VOUT. It is measured when the output voltage drops 1% below its nominal value. MAX UNITS 0.01 1 0.8 0.1 100 2 600 mA V V mA mA 2 VTH(FG) VHYS Output Ramping Up VF(SAT) Io=5mA Io=500mA Note 1: Low duty cycle pulse testing with Kelvin connections is required in order to maintain accurate data. TYP 5 0.8 400 230 %VO %VO mV Note 3: Ground current is the regulator quiescent current plus the pass transistor current. The total current from the supply is the sum of the load current plus the ground pin current. Note 4: The specification applies for the junction temperature of 0 to +1258C. PIN DESCRIPTIONS PIN SYMBOL VIN (All devices) PIN DESCRIPTION The input pin of the regulator. Typically a large storage capacitor is connected from this pin to ground to insure that the input voltage does not sag below the minimum drop out voltage during the load transient response. This pin must always be 0.6V higher than VOUT in order for the device to regulate properly. VOUT The output of the regulator. A minimum of 2.2mF capacitor must be connected from this pin (All devices) to ground. Gnd Ground pin. This pin must be connected to the lowest potential in the system and all other (All devices) pins must be at higher potential with respect to this pin. Enable Enable pin. A low signal or left open on this pin shuts down the output. This pin must be tied (IRU1207, IRU1209) HI or to VIN for normal operation. Flag An open collector output that switches low when the output voltage drops about 4% below (IRU1207, IRU1208) its expected regulated voltage. Adj A resistor divider from this pin to the VOUT pin and ground sets the output voltage. (IRU1208, IRU1209) APPLICATION INFORMATION Part Number Stability The IRU120X series of regulators require the use of an output capacitor as part of the frequency compensation in order to make the regulator stable. A minimum of 2.2mF capacitance and the ESR in the range of 0.5 to 2V insures the stability of the system. IRU1206-18 IRU1206-25 IRU1206-33 IRU1207-18 IRU1207-25 IRU1207-33 IRU1208 IRU1209 Output Voltage 1.8V 2.5V 3.3V 1.8V 2.5V 3.3V 1.24V 1.24V Table 1 - Output voltage vs. part number. Rev. 2.3 08/02/02 www.irf.com 3 IRU1206 / IRU1207 / IRU1208 / IRU1209 TYPICAL APPLICATION VOUT 3 VOUT IRU1206XX Gnd 2 VIN C2 1 VIN C1 Note: Tab must also be connected to ground. Figure 2 - Typical application of IRU1206. Ref Desig Description Qty Part # Manuf C1 Capacitor 1 10mF, Tantalum AVX C2 Capacitor 1 10mF, Tantalum AVX 5 Gnd Flag 4 Error Flag 6 Gnd V OUT 3 VOUT IRU1207 R1 7 Gnd V IN 2 8 Gnd Enable 1 SD C2 Enable VIN C1 Figure 3 - Typical application of IRU1207. 4 Ref Desig Description Qty Part # C1 Capacitor 1 10mF, Tantalum AVX C2 Capacitor 1 10mF, Tantalum AVX R1 Resistor 1 10KV, 5% Panasonic www.irf.com Manuf Rev. 2.3 08/02/02 IRU1206 / IRU1207 / IRU1208 / IRU1209 TYPICAL APPLICATION 5 Gnd Adj 4 6 Gnd V OUT 3 VOUT R1 IRU1208 7 Gnd V IN C2 2 R2 8 Gnd Flag R3 1 Error Flag VIN R1 Vo = 1.24 3 1 + R2 ( C1 ) Figure 4 - Typical application of IRU1208 in 3.3V to 2.5V regulator. Rev. 2.3 08/02/02 Ref Desig Description Qty Part # C1 Capacitor 1 10mF, Tantalum AVX C2 Capacitor 1 10mF, Tantalum AVX R1 Resistor 1 127V, 1% R2 Resistor 1 124V, 1% R3 Resistor 1 10KV, 5% www.irf.com Manuf 5 IRU1206 / IRU1207 / IRU1208 / IRU1209 TYPICAL APPLICATION 5 Gnd Adj 4 6 Gnd V OUT 3 VOUT R1 IRU1209 7 Gnd VIN C2 2 R2 8 Gnd Enable SD 1 Enable R1 Vo = 1.24 3 1 + R2 ( VIN C1 ) Figure 5 - Typical application of IRU1209 in 3.3V to 2.5V regulator. 6 Ref Desig Description Qty Part # C1 Capacitor 1 10mF, Tantalum AVX C2 Capacitor 1 10mF, Tantalum AVX R1 Resistor 1 127V, 1% R2 Resistor 1 124V, 1% www.irf.com Manuf Rev. 2.3 08/02/02 IRU1206 / IRU1207 / IRU1208 / IRU1209 CHARACTERISTICS IRU1209 Line Regulation @ 5mA to 100mA Vout Percent Error % Error Vout 1.25 5.00% 1.245 4.50% 1.24 4.00% 1.235 3.50% 1.23 3.00% 1.225 2.50% 1.22 2.00% 1.215 1.50% 2V 3V 2. 5V 4V 3. 5V 4. 5V 5V 6V 5. 5V 7V 6. 5V 7. 5V 8V 9V 8. 5V 10 V 9. 5V 11 V 0.00% 10 .5 V 0.50% 1.2 12 V 1.00% 11 .5 V 1.21 1.205 Input Voltage Figure 6 IRU1209 Maximum Output Current ~ 1.25A while in the current limit mode. IRU1209 Output Voltage in Yellow. A DC offset equal to the output voltage is applied to improve resolution. The output is regulating current in this mode. Figure 7 Rev. 2.3 08/02/02 www.irf.com 5 Sep 2001 15:15:05 7 IRU1206 / IRU1207 / IRU1208 / IRU1209 CHARACTERISTICS IRU1209 Voltage Drop-out Variation with Ambient Temperature with various load currents IRU1209 Vout Variation with Ambient Temperature with Vin @ 3.5V and 12V 2.55 2.5 2.4 2.54 2.53 mA 2.3 2.2 2.52 2.1 2.0 1.9 100 mA 500 mA 2.51 3.5 V 1A 2.50 12V 2.49 1.8 1.7 2.48 1.6 1.5 2.47 -50 0 50 100 2.46 150 -50 Temperature ( 88C) 0 Figure 8 50 100 150 Figure 9 IRU1209 Ground Current Variation with Ambient Temperature 100 90 80 70 mA 60 50 40 30 20 10 0 -50 0 50 100 150 Ambient Temperature ( 88 C) Figure 10 IR WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, USA Tel: (310) 252-7105 TAC Fax: (310) 252-7903 Visit us at www.irf.com for sales contact information Data and specifications subject to change without notice. 02/01 8 www.irf.com Rev. 2.3 08/02/02 IRU1206 / IRU1207 / IRU1208 / IRU1209 (D) TO-252 Package 2-Pin K A C B L M 78 458 D J N E O P Q R G F S H R1 SYMBOL MIN MAX A 6.477 6.731 B 5.004 5.207 C 0.686 0.838 D 7.417 8.179 E 9.703 10.084 F 0.635 0.889 2.286 BSC G H 4.521 4.623 J &1.52 &1.62 K 2.184 2.388 L 0.762 0.864 M 1.016 1.118 N 5.969 6.223 O 1.016 1.118 P 0 0.102 Q 0.534 0.686 R R0.31 TYP R1 R0.51 TYP S 0.428 0.588 C L NOTE: ALL MEASUREMENTS ARE IN MILLIMETERS. Rev. 2.3 08/02/02 www.irf.com 9 IRU1206 / IRU1207 / IRU1208 / IRU1209 (S) SOIC Package 8-Pin Surface Mount, Narrow Body H A B C E DETAIL-A PIN NO. 1 L D DETAIL-A 0.386 0.015 x 458 T K I F J G 8-PIN SYMBOL A B C D E F G H I J K L T MIN MAX 4.80 4.98 1.27 BSC 0.53 REF 0.36 0.46 3.81 3.99 1.52 1.72 0.10 0.25 78 BSC 0.19 0.25 5.80 6.20 08 88 0.41 1.27 1.37 1.57 NOTE: ALL MEASUREMENTS ARE IN MILLIMETERS. 10 www.irf.com Rev. 2.3 08/02/02 IRU1206 / IRU1207 / IRU1208 / IRU1209 (Y) SOT-223 Package 3-Pin SYMBOL A A1 B B1 C D E e e1 H Q Q1 Q2 S T D B E e H S MIN 1.498 0.02 2.895 0.637 0.239 6.299 3.30 2.209 4.496 6.70 08 78 78 0.838 1.092 MAX 1.702 0.11 3.15 0.85 0.381 6.706 3.708 2.953 4.699 7.30 108 168 168 1.05 1.30 NOTE: ALL MEASUREMENTS ARE IN MILLIMETERS. e1 Q1 T B1 Rev. 2.3 08/02/02 A Q C A1 Q2 www.irf.com 11 IRU1206 / IRU1207 / IRU1208 / IRU1209 PACKAGE SHIPMENT METHOD PKG DESIG PACKAGE DESCRIPTION PIN COUNT PARTS PER TUBE PARTS PER REEL T&R Orientation D TO-252, (D-Pak) 2 75 2500 Fig A S SOIC, Narrow Body 8 95 2500 Fig B Y SOT-223 3 80 2500 Fig C 1 1 1 1 1 1 Feed Direction Figure B Feed Direction Figure A 1 1 1 Feed Direction Figure C IR WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, USA Tel: (310) 252-7105 TAC Fax: (310) 252-7903 Visit us at www.irf.com for sales contact information Data and specifications subject to change without notice. 02/01 12 www.irf.com Rev. 2.3 08/02/02